Abstract
The morphological, cultural, biochemical, serological and pathogenic properties of two bacterial strains of the group designated ‘Br. suisbiotype 5’ were examined. Both strains were found to be atypical of the genusBrucellain many of these characteristics. No serological relationship to known brucella strains could be detected. On the basis of the evidence obtained the two strains examined were classified asMoraxella duplexand the status of ‘Br. suisbiotype 5’ questioned.